Chimney-cap



(No Model.)

v GHIMNEY GAP. Y I No. 287,553." Paxented. O 30? 3 F g-5, I

.U'NITED. STATES;

PATE T OFFICE.

' FRANCIS H. LEONARD, or Bosron, MASSACHUSETTS.

CHIMNEY-CAP.

SPECIFICATION forming part of Letters Patent No. 287,553, dated October so, 1883.

Application filed July 19, 1882. (No model.)

To all whom it may concern:

Be it known that I, F. H. LEONARD, of Boston, in the county of Suffolk in the State of Massachusetts, have invented certain new and useful Improvements in Caps or Oowls for Chimneys, Ventilating-Shafts, &c., of which the following is a specification.

The aim of my invention is to provide a chimney-cap by means of which a strong upward draft may be induced in achimney or other flue regardless of the quarter from which the wind may blow, to preventthe rain, snow,

and dust from entering the top of the flue, and

to prevent thepossibility of eddies or downward currents therein.

To this end it consists in a stationary cap 7 or mouth-piece containing inclined overlapping shelves, and combined with apendent head or covering of a A form, and arrangedin such manner that it will close against one side or the other of the cap, according to the direction of the wind, affording, however, an outlet-opening for the smoke or air at the op- 1 posite side;

angles-to the axis of the hood. Fig.3 re'presents a perspective view of the stationary cap or mouth-piece, one end being broken away, to expose the internal shelves or deflectors.

In constructing my device I first provide a cap-piece, G, such as plainly represented in Fig. 3, having two vertical end walls united by means of two side plates, 0, which converge toward their upper edges, thewhole constituting a rectangular mouth or outlet of diminishing area toward its top. The mouth-piece is provided with an outwardly-extending supporting flange or plate, I), designed to rest on top of the chimney or other flue, and is also provided at the outer edge with a depending flange, a, designed to encircle the outer surface of the chimney, for the double purpose of retaining the cap in position thereon and of strengthening the mouth of the chimney, and preventing that disintegration of the month which commonly occurs in consequence of the difference between the internal and external temperatures, andfrom other. causes.

Within the mouth-piece I arrange two or more fixed shelves or deflectors, 'e and ,6, extending from end to end and inclining inward and upward from opposite sides in such manner that their inner edges overhang one another, with suitablespace between them for V means of transverse bars or rods seated against the outer faces of the chimney, the ends of these rods being threaded and inserted through the standards, 'and secured by nuts upon their outer ends, as clearly showninFigs. l and 2. The bars thus applied serve to force and hold the standards firmly in position against the chimney and against the exterior of the mouthpiece, thus confining the standards and the mouth-piece in position upon the chimney, and at the same time binding the latter together in such manner as to give additional strength thereto. 4

To theupper ends of the standards I pivot, by means of a horizontal rod, is, or otherwise, the swinging cap or hood A, having a A form in vertical section, with its ends closed by vertical plates. This cap or hood is made of such size as to fully coveriand protect the mouth-pieceO, and extends downward on all sides of the same, a sufficient space being left in its interior to admit of its swinging freely to and fro, in order that either one of its inclined sides may close against one of the inclined sides of the mouth-piece, and thus prevent the admission of air to the mouth-piece on that side of the device, while affording a free outlet from the mouth-piece through and beneath the hood at the opposite side.

In order to prevent the noise and shock which would otherwise be occasioned by the contact of the swinging hood with the-mouthpiece, I provide the cap, 011 each side, with a rubber cushion or buffer, preferably consisting, as shown in the drawings, of a rubber or other elastic tube mounted upon a central rod secured in the lower edge of the hood.

In order to prevent constant vibration of the swinging cowl or hood, and to assist in retaining the same in its operative position, I weight the top of the same in such manner that, as the position of the hood is changed, the weight being thrown to one side or the other of the center, will tend to retain the hood in either position in which it may be placed. It is preferred to employ two weights applied to upright arms upon the hood, as shown in the drawings.

I am aware that mouth-pieces have been provided with cowls or caps arranged to swing to and fro upon a horizontal axis, in order to afford an outlet 011 the lower side only of the chimney, and this I do not broadly claim.

The present invention is restricted to those matters and things which are hereinafter claimed, and as to all matters which may be described or shown. but which are not claimed, the right is reserved to make the same the subject of a separate application.

Having thus described my invention, what I claim is 1. In combination with the swinging hood, the stationary mouth-piece, substantially as described, provided with the internal deflectors extending from the opposite walls inward and upward one above the other, as described and shown.

2. In combination with the swinging hood, .the flanged mouth-piece, the standards to sustain the hood applied to the outside of the mouth-piece, and the connecting bars or bolts, as described and shown, whereby the standards and the mouth-piece are both secured firmly in position upon the chimney.

3. In combination with the mouth-piece, substantially as described, the swinging cow], and the buffers or cushions applied to thelower edges thereof, each buffer consisting of a metallic rod encircled by an elastic tube.

4. In combination with the swinging cowl, the angular mouth-piece and the two flat i11- clined shelves E E, extending from the opposite walls upward and inward; one above the other, each having an upturned lip at its edges.

FRANCIS H. LEONARD.

In presence of- LEVI H. CLEMENT, Asa FRENCH. 

